Method of making composite insoles.



F. ZALESKI.

METHOD OF MAKING COMPOSITE INSOLES. APPLICATION FILED OCT. 2!. I916.

Patented Jam 9,1917.

2 SHEETS-SHEET I- Fig. I

Inveni'or. Frank Zclleski F. ZALESKI.

METHOD OF mAxmercomg 0000000000000 s.

APPLICA 1,21 1,520. Patented Jan. 9, 1917.

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,FRANK ZALESKI, U11 SOMERVILIJE, MAS MACHINERY COMPANY, OF BOSTON MAINE. r

SACHUSETTS, ASSIGNOR TO REECE SHOE MASSACHUSETTS, A conronA'rron OF METHOD OF MAKING COMPGSITLF] INSOLES.

Application filed October 21, 1916.

In a co-pendingapplication Se...No. 121,875,.

filed $eptember 23, 1916, by A. R. Schoenky,

is illustrateda composite insole comprising an inner member. having the edge portion thereof folded back onto the body thereof and an outer member having the edge portion projecting beyond the periphery of the inner member and formed by folding back on itself the portion of the outer member directly circumjacent the inner member, the peripheral edge of said outer member being free and forming a lip. In an insole of this type, the portion of the outer member whlch is folded back on itself. and which is directly circumjacent the peripheral edge of the inner member constitutes the so-called feather edge of the insole, and in order that the 'in sole may be practical, it is essential that the portion of the outer member which is thus folded back should be firmly secured to the body of the outer member. This may be done by cementing the folded portions' td gether.v Inthe commercial manufacture of insoles of this type, the folding of the outer member will be done by means of a folding machine, and the use of cement for cementing the folded portion of the outer member together is liable to interfere with the opera-- tion of the folding machine.

The object of my invention is to provide a novel method of-making the insole by which the folded-over portion of the outer member of said insole can .be caused to firmly adhere to the body thereof, thus produc ng a rigid and stiff feather edge on the Insole without, however, interfering in any way with the normal operation of the folding machine by which the outer member is thus folded. I accomplish this by providmg the face of the outer member with a coating of adhesive which when cold and dry/is not sticky or tacky, but 1 which when heated will become sticky and adhesive. The folded inner member is placed on the face of the outer member Which is thus prepared and Specification of Letters Patent.

Patented Jan. 9,1917.

Serial No. 127,012.

the projecting portion of the outer member is then folded over by means of-a" folding machine or otherwise to produce the folded A edge of the insole, and the body and folded portion of the outer memberare then subjected to heat which softens the 'adhesive SUfhCleHtly to cause the folded-over portion to adhere to the body thereof and said body to adhere to the inner member. Y

In order to give an understanding of my invention, I have illustrated in the drawings oneway of'practising my invention which will now be described, after which the novel features will be pointed out in the appended claims.

Figure 1 of the drawings is a perspective view showing an insole made in accordance with my invention; Fig. 2 is a similar View showing the inner member with its edge folded; F ig. 3 is a perspective .view showing the blank from which the outer member is formed, which blank is provided with the coating of adhesive; Fig. 4 is a perspective sectional view showing the inner member placed in position on the outer member preparatory to folding the edge of the outer member; Figs. 5, 6 and 7 are views showing the steps of folding the projecting edge portion ofthe outer member.

Before describing my improved process, I will refer briefly to the complete insole.

This comprises. an outer member 1 and an "material. The inner member 2 has the edge thereof folded over onto the body, as shown at 3, and the outer member extends beyond I the inner member, and the portion of the outer member immediately circumjacent the:

inner member is folded back on itself, as shown at 4, and the edge of the folded-back portion is thenturned upwardly to present a lip 5. This folded portion 4 of theinsole constitutes the feather edge thcreof,.and the lip 5 together with the folded-over edge 3 of the inner member constitute the inseamreceiving rib for receiving the. inseam stitches in the manufacture of the boot or shoe. The folded-over portion 4 of the outer member is firmly secured to the body of the outer member so as to make a stiff and solid feather edge to the insole. I

In making this insole by my improved method, I first form the inner member from and become sticky or tacky. "While any suit able adhesive material having these charactensucs may be used, I will preferably use anadhesive material, such as rubber cement.

This maybe provided in liquid form by dissolving or cutting the rubber in naphtha or benzin,\and when it is applied to the surface of the blank 7 for the outer member, it will adhere thereto but will soon become sufficiently dry so that the coated surface of the blank 7 will not be sticky or tacky. The blanks in this condition can be readily handled, without sticking together and as freely as they could be if there was no coating of adhesive material applied thereto. If, however, the blank is heated, the adhesive coat- [ing will soften sufficiently to become sticky.

After the blank 7 for the outer member has thus been provided with the coating of adhesive and has become dry enough to be handled, the folded inner member 2 is placed on the outer member with the edge portion 8 of the outer member projecting, as shown in- Fig. 1, and said projecting edge of the outer member is then folded back on itself, as shown at 4, and upwardly to present the up= turned edge 5, as shown in Fig. 1. In thus folding the edge portion 8, it will be convenient to use a foldingmachine having the principal element's shovfn in Figs. 5, 6 and. 7, al hough so far as the invention is concerned, the folding inight be done by hand or in- 11y suitable way. i The elements of table on the fol ing niachine illustrated comprise a work support 9 on which the outer ember is placed, a holding member '10 adapted to rest on the inner member 2 of the iiisole and clamp the latter against the unf der meniber 1, collapsible forming or gage eleents 1 in the form of sheets over which the edge 4 aybe folded, 1n,d fdlding ele h ents 12 cons riicted to'engage the projecting edge of th undersnem'ber l and fold'the latter over the; formers 11 and then press the folded portions together. The 'formerelements 11 are cbnstructed tobe movablelaterally so that th y can be withdrawn when the fold is completed. "In' making the :fold 4, the outer member 1 is placed on the work support Q/with the edge 8 of the outer member projecting beyond the edge of the work sup- I port and overlying the folding elements 12.

Gilli e inner member 2 with its edge folded is 13 en placed in position on the under member 1 and the clamping member 10 isbrought expanded into the position shown in Fig. 5. The folder elements 12 arethen moved upwardly into the dotted line position Fig. 5,

thus turning up the edge 8 around the former elements 11, and said folder elements are then moved inwardly over the formerelements, as shown in Fig. 6, thereby folding the'edge of the outer member over said former elements 11 and against the clamping member 10. The former elements are then withdrawn inwardly and the folder elements 12 are movedflownwardly to set the fold 4, as seen in Fig. 7. The member 9 and the folder elements 12 are heated so that during the folding operation,the outer member will be sufficiently heated to soften the coating 6 of adhesive material and render it .sticky or tacky. By the time that the fold 4: is made and pressed'together, as shown in Fig. 7 the adhesive 6 is sufficiently softened so that when the folder elements 12 are pressing the fold 4., said fold will be caused to adhere to the body of the insole. The heat produced in the work support 9 also softens the adhesive on the body of the outer mem- 1 ber 1 so that the inner and outer members will be caused to firmly adhere together.

In the operation of the folding machine, it ,is essential that the former elements 11 should not stick or adhere to the coated surface of the under member 1 because if this occurs, a proper fold cannot be made as the 1 withdrawing movement of the former elements 11 will disturb the fold. By using adhesive material such as above described, the former elements 11 can be moved freely without disturbingthe fold in anyway because? the adhesive will not become sticky or tacky until it has been heated after the fold has been made andl while the fold is beii ng set, as shown in Fig. 7.

outer me ber, folding the 'projec ing portion of said outer member back out the body thereof and forming its periphera edge into a lip, and subjecting said outer ember to the action of heat whereby the adhesive coating becomes sufficiently tacky to cause the two members to adhere together and to cause the folded-over portion of the outer memher to adhere to the body thereof.

2. The method of making a composite in-' sole comprising an inner and an outer memher which conslsts n applying to one face'13 0 of the outer member a coating of adhesive material Which When dry will not be sticky or tacky but which will become sticky or tacky when subjected to the action of heat, placing the inner member on the coated face of the outer member when the latter is dry, folding back directly on itself the portion of the projecting edge of the outer member immediately circumjacent the edge of the in- 10 ner member thereby to make a fold; in the outer member which is situated entirely exterior t0 the inner member and subjecting the outer member to sufficient heat during the folding operation to soften the adhesive coating and render the same sticky or tacky.

In testimony whereof, I have signed my name to this specification.

FRANK ZALESKI. 

